Alarm for incubators or brooders



Dec. 27,1932. v 1 J. MACHACEK 1,891,994

ALARM FOR INGUBAToRs oR'BRooDERs Filed April 4. 1931 lsatentecl Dec. 27,1932 Unirse STATES JOHN J. MACHACEK, or WnsroN, NEBRASKA, ASSIGNOB QF,ONE-HALF fr or vALPenAIs ALARM FOR INCUBA Application filed April 4,

This invention relates to alarms espec'ally adaptable for incubators,broeders and the like and has for the primary object, the provision of athermostatically controlled switch adapted to automatically close anelectric circuit to the alarm when the temperature in an incubator' orbroeder rises or 'falls below a predeterm'ned temperature, sor that theattendant Will be warned in sufficient time to prevent ing ury tochickens from either excessive or from too low `a temporature, therebyallowing the attendant to `be tree for other Work or for sleep atnighttime and until such time the incubator or broeder needs attention.n

Another object of this inventori is the provision of an alarm for theincubator or brooder ot the above stated character which will be simple,durable and efficient and 20 which may be manufactured and sold ai; acomparatively low cost. y

lVith these and other objects in View. the invention consists in certainnovel features of construction, combination and arrangement oi' parts tobe hereinafter more fully described and claimed.

For a complete understanding of n y invention, reference vis to be hadto the following description and accoi'npanying drawing, yin which Thefigure is a perspective vView' illustrating an alarm for an incubator orbrooderconstructed in accordance-With my invent'on.

Referring in detail to the drawing, the numeral 1 indicates a base otelongated formation preferably consructed 'of metal or any othermaterial suitable to provide a conductor for electricity and still havethe desired rgidity for supporting the device. yThe base 1 is bentintermediate its ends to form a substantially inver-ed V-shaped pivotedsupporting portion 2 and which is slotted inwardly from the apex portionas shown at 3 to provide spaced bearing portions t receiv- 5 "ng a pivotpin G on which is journalled a thermostat bar or arm-7. The bar or arm 7is pivotally mounted intermediate its ends and has one end disposedbetween vertical guide members 8 ormedr integral With one' end ot thebase While the other end of the Cil ' and the arm portions 9 thereof areprovided m" Tr-mfr OFFICE o V:restart EGR, i

0, NEBRASKA;

'reas .on BROQDERS 1931.v semi Np. 527,837".

bar or arm 7 extends between the arm portions 9 of asubstantiallyU-shaped contact member 1 0.y The Contact lforms anintegral construction with oneendof the base 1 55 with screw-threadedopenings to receive screw-'threaded contactpoles 11 which may beadjusted toward and from each vother-and relative to the` arm portions,91as desired.l A thermostatic disk 12 lis mounted on the base as shownat 13 and carries relatively spaced guide members ,'14 Which receiveytherebetween the bar or arm Thefguide menibers Mare connected byva stopmember 15 and is also connected to a battery or other electrical source21 by a conductor 22. A conductorv 23 connects the battery or electricalsource 21 to one of the contact poles 11.

It is rto be understood that thebase 1 is mounted or located in anysuitable manner Within a brooder or incubator that the disk 12 Will beaected'by the temperature Within the incubator `or brooder, While thealarm 19 may be located at any desired place such as in the sleepingquarters of the attendant. Should the temperature in the incubator 0rbrooder rise or fall below a predetermined degree, the bar or arm 7 Willbe rocked on its pivot 6 by the thermostatic disk 12 engaging eitherV ofthe contact poles 11 by the movable contact pole 17 completing anelectrical circuit to the alarm, consequently indicating to theattendant that the temperature Within the incubator or brooder eitherhas raised or lowered beyond a predetermined degree, therefore hisattention is necessary for regulating the heating plant of the brooderor incubator that the temperature may be again brought to the desireddegree.

While I have shown and described the preferred embodiment of myinvention, it will be understood that minor changes in construction,combination and arrangement of parts may be made without departing fromthe spirit and scope of the invention as claimed.

Having thus described my invention, what I claim is:

A temperature control switch com rising an elongated base of electricalcon uctive material having its intermediate portion offset in V-shapeand slotted and apertured to provide spaced bearings disposed in a planeabove the base, a pivot in said bearings and extending across theslotted portion of the V-shaped offset, an arm extending Varallel withthe base and apertured interme iate its ends to receive the pivot topermit the arm to rock within the slotted yportion of the V-shapedoifset of the base, said base having a curved portion at one end withone end oi the arm movable therebetween and connected to an electriccircuit of an alarm, a contact carried by and insulated from the arm andconnected to the electric circuit of the alarm, a thermostat carried bythe base, a forked member movable with the thermostat and receiving thearm to impart pivotal movement thereto for engaging and disengaging thecontact of said arm with the base, and a tension means between the armand the base to urge said arm into engagement with the forked member.

In testimony whereof I aiiixkmy signature.

JOHN J. MACHACEK.

